One of the most unexpected Colts seasons in history is in the books. In the midst of a franchise rebuild and on the heels of a 1-5 start, the Colts finished with a 10-6 regular-season record, won a playoff game and shocked the world. They had two rookies voted All-Pro (Quenton Nelson and Darius Leonard), quarterback Andrew Luck’s shoulder is just fine and they will likely be next season’s favorite to win the AFC South.

And come this fall, none of this will matter.

NFL people have a saying: If you’re not getting better, you’re getting worse. So, with the arrival of the offseason comes the beginning of the work.

What are the Colts going to do to improve? How are they going to build on the foundation of 2018?

Here’s an overarching look at what lies ahead in the offseason:

Greatest offseason need: The Colts did an impressive job of manufacturing a pass rush for a team without a true pass rusher. The Colts...